feldmann



(No Model.) ssheets sheet 1.

H. B. FBLDMANN. PULVBRIZING MACHINE.

No 275,031. Patented Apr. 3, 1883.

f S CW2) (No Model.)

I a Sheets-Sheet 2. H. B. PELDMANN.

' PULVERIZING MACHINE- Patented Apr. 3

hn'oLithugmphan Wmhln'ghn. n. a

'3. Sheets-Sheet 3! H. B. FBLDMANN.

PULVBRIZING MACHINE.

(No Model.)

Patented Apr. 3,1883.

ll/I/I/II/III/IIII/ II/IIIIIlIII/IIII/ WITNESSES:

UNITED STATES ATENT HERMANN B. FELDMANN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO STEPHEN P. M. TASKER, OF SAME PLACE.

PULVERlZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 275,031, dated April 3, 1883,

Application filed December 19, 1882. (No model.)

To all whom it may concern: of a pulverizing-machine iii-which one or two Be it known that I, HERMANN BERNHARD independent balls or crushing-spheres can be FELDMANN, of the city and county of Philaemployed, and in which the ball or balls is or delphia,in the State of Pennsylvania, have inare permitted to move to and from the ballr vented a new and useful Pulverizing-lllachine, track, as in passing over material of varying 5 of which the following is a specification. size, without being at any time free from the My invention relates to a class of pulverizinfluences which occasion their compound inoing-machines in which the pulverizing instrution. mentality is an independent ball or crushing- A preferred form of a convenient embodi- [O sphere inclosed within a casing, and by any ment of my invention is hereinafter described 60 suitable means caused not only to revolve and claimed, the proportions represented bearound the casing, but also to rotate about its ing those adopted when but one ball, as, repow'n axis. resented and described, is employed.

In machines of the above class it is usual In the accompanyingdrawings,in which simto providea ball-track within the casing, upon ilar letters of reference in the several figures 65 which the ballis forced to travel, and between indicate corresponding parts, Figure 1' is a which and the surfaces of the ball the pulvercentral vertical longitudinal sectional elevaizing action takes place. This track may tion of a machine conveniently embodying my m either be applied as a separate member or be improvements. Fig. 2 is a vertical side sec- 2: formed as an integral portion of the casing. tional elevation through the casing, the ball- 70 Heretofore two distinct means of imparting actuating annulus, one of the disk-hubs, and motion to the ball have been resorted toviz., the shaft, taken on the dotted line a a of Fig. first, by the application, in connection with a 1. Fig. 3 is a vertical central front sectional central shaft concentrically journaled in the elevation of the ball-actuating annulus. Fig.

casing, of a radial arm projected from said at is a side elevation of the same. Fig. 5 is 7 shaft and rotated byit,which impinges against an inside front elevation of one of the annu- 7 the rear of the ball, and so occasions its revoins-operating disks. Fig. 6 is a vertical cenlution-a method enabling, if desired, the use tra-l side sectional elevation of the same, taken of several balls, but defective,in that no presson the line b b of Fig. 5. Fig. 7 is a longinre is exerted to hold the ball or balls down tudinal central vertical sectional elevation 80 upon the track other than that due to centrifuthrough one of the stuffing-boxes. Fig. 8 is a gal movement; and, second, by the applicaside elevational detail of a modified construcv tion to a shaft concentricallyjournaled in the tion and arrangement of the disks and of the casing of a pair of vertically-erected disks prosprings supporting the ball-actuating annulus.

5 videdwith peripheralbeveled bearing-surfaces, Fig. 9 is a vertical sectional elevation of the 8 and arranged face to face at some distance on same, taken on the line 0 c of Fig. 8. either side of the center of said shaft, the said Before proceeding to a detailed description disks being capableof rocking movements,but of the several instrumentalities which go to being caused to bear or press upon the ball in compose my invention, it is proper to premise their effort to assume, avertical position, which that any preferred form of casing other than 90 F the size of the ball tends to prevent, crowd that represented may be employed, and that it against the casing with greater or less force, any hopperorfeeding contrivance maybe used according to the rapidity of the revolution, and in connection therewith. by the friction of the contact carryit with them In the drawings l have represented a casing 5 around the casing and communicate toitboth of a character invented by Stephen P. M. 5 a centrifugal motion and an axial rotation-21. Tasker, of Philadelphia, and patented to him method better than that first described, but in and by Letters Patent No. 265,713, dated necessitating the employment of but a single October 10, 1882, and have also represented it I ball. as applied in connection with a receiver (with- My invention comprehends the construction in which said casing is erected) of acharacter 10o invented by Mr. Tasker and embraced in an application for Letters Patent filed by him in the United States Patent Office upon the 23d day of November, 1882.

In the drawings, A represents the casing proper, it being a cylindriform receptacle, the sides of which are inclosed by screens 13, and which is provided with an independent circumferential ball-track, D.

0 represents the receiver, centrally within which the casing is erected; and E are the pedestals forming a part of or connected with said receiver, and carrying the bearings F for the central driving-shaft, G.

H are pulleys, and I balance-wheels applied for the actuation of the shaft.

The above devices are convenient; but I do not restrict myself to them only in connection with the devices constituting my invention, as other devices of a kindred character, but of mechanically different construction, can be, with perhaps equal profit, substituted in their stead.

J is a crushing sphere or ball upon the balltrack. One only, as stated, is represented in the drawings and herein described; but two may be employed.

K is what I term a ball-actuating annulus, Figs. 1, 2, 3, and 4, the same being a ring of metal, preferably chilled iron, the exterior face of the periphery of which is conformed to the arc of the crushing sphere, and which is placed about the shaft, so as to register in place within the ball-track. The annulus is provided with a series of laterally-projecting pockets, L, designed to receive the outer extremities of spiral springs M, the inner extremities of which pass through radial slots N in the hubs of annulus-operating disks 0 and abut against the shaft, as hereinafter more fully explained.

Oare whatIterm annulus-operatiugdisks, Figs. 1. 2, 5, and 6, the same being metallic plates of a diameter less than that of the interior of the casing, and each provided with hubs P, conformed to a squared central portion, g, of the shaft, so as to be adapted to rorate in fixed connection therewith. The hubs project from one face only of the disks, and the disks are oppositely placed upon the shaft, so as to cause the hubs to abut, being fixedly retained together and upon the shaft by means of disk-nuts Q, threaded on the shaft. The inner opposite faces of the disks, preferably down to the hubs, are provided with raised radial webs R,which project between the pockets upon the sides of the annulus, and in the revolution of the disks impinge against said pockets and occasion the revolution of the annulus. It will now be understood that upon the revolution of the shaft the disks revolve, and with them the annulus, as stated. The space between the radial webs upon the disks is such as to permit of the free movement of the pockets, and consequently of a motion of the annulus to and from the shaft in any direction. The annulus is in equilibrium upon its springs, eight of which are in the drawings represented as supporting it; and it will be readily seen that while the annulus is free to rotate with the shaft and disks it is also capable of movement to and from the shat'tin any direction under theinfluence of any force which presses upon it and tends to compress such of its supporting-springs as resist the pressure. The ball is made of suflicient size not to fit between the annulus and the balltrack when the annulus is concentric with the track, but is of such size as when in place upon the ball-track to occasion the placing of the annulus eccentrically with respect to the ball-track. When the ball is in place the annulus, as will be readily understood by reference to the drawings,and especially to Figs.

'1 and 2, being forced into an eccentric position with respect to the shaft and hall-track under the influence of its springs, will be constantly pressing upon the ball with greater or less force, according to the strength of the springs and the rapidity of the revolution, in its endeavor to reassume its concentric position.

S are stuffing-boxes erected in the screens at the sides of the casing, and designed to prevent the egress of pulverized material from out the casing except through the mesh of the screens. These boxes are each provided with a water-chamber, T, into each of which a supply-tube, U, connected with a constant source of water-supply, opens. They are also provided with an outlet or discharge tube. Z, through which the water can escape. The stuffing-boxes are thus kept constantly wet, with the result that any gritty particles happening to enter them are suspended in the water and prevented from entering that por tion of the stutting-hoxes in which thepacking material V is placed.

Having thus described a preferred form of apparatus conveniently embodying my in vention, the operation will be very readily understood. One hallbeing supposed in place upon the track,and motion being supposedimparted to the shaft, the disks rotate with the shaft and occasion the rotation of the annulus, in the manner already described. The energy of the compressed springs, developed by their constant tendency to expand, acts outwardly against the annulus and occasions a constant pressure of the annulus against the ball, whatevermay be the position of the ball with respect to the hall-track and casing, and thereby, also, as the annulus rotates, occasions not only the revolution of the ball around the track, but also its axial rotation. By this means, as will be obvious, a continuous pressure is exerted upon the ball whatever be its position, which pressure,while constantin fact, is yielding in degree, so as to enable the lifting of the ball over substances which it cannot at first crush, and so permit, if I may use the term, the varying eccentricity of the annulus, the latter, however, as explained, never being concentric when the ball is in place.

ITO

That construction which enables the constantpressure, yet varying eccentricity, of the annulus when the ball is in place, and which yet insures its concentricity and equipoise when the ball is not in place, being vital to the invention, it will be obvious to any mechanic that other devices than spiral springs may be employed to such result. Thus, for instance, in Figs. 8 and 9 I have representedamodified construction in which coiled band-springs are substituted in the stead of the spiral springs. In place of band-springs, however, rubber cylinders or kindred devices can be substituted.

The gistof the-invention, so far as the annulusis concerned, resides in the provision of any suitable means whereby the annulus can be cushioned, so to speak, in any direction with respectto the shaft, and bein such manner held in suspension that upon pressure being exerted upon it in any direction it can be forced from such direction in toward the shaft, but upon the relief of such pressure will resume its normal position ot'concentricity therewith.

Areference to Figs. 8 and 9 will show that in the structure therein represented the disks are modified to be simply circular plates of metal fitted to the squared center of the shaft, but made without either hubs or radial webs, and that about the squared center of the shaft and between the disks is placed a sleeve, W, conformed to the shaft, to which are rigidly connected the inner extremities of bandsprings X, the outer extremities of which are rigidly connected to the interior face of the annulus, which latter is made without pockets. Two band-springs are represented in the drawings; but less or more than two may be employed, the annulus being in suspension upon said springs. The device is ordinarily employed with but a single ball, and is operative to the best advantage in such arrangement. The advantages incident to this construction are those incident to both the former constructions hereiubefore recited, while there is the additional advantage of simplicity and cheapness of manufacture. V

Haviugthus described my invention, I claim and desire to secure by Letters Patent- 1. In a pulverizing-machine, the following instrumentalities in combination: first, an inclosing-casing provided with aball-track; second, an independent ball or crushing-sphere; third, a ring or ball-actuating annulus regis tering within the ball-track, and bearing as to its convex surface, or exterior periphery upon the ball; fourth, suitable mechanism for cansing the annulus to impart to the ball not only a motion of revolution around the casing and an axial rotation, but also a constant pressure against the track; and, fifth, means for-imparting rotation to said annulus.

2. Ina pulverizing-machine, the following instrumentalities in combination: first, an inclosiug-casiug provided with aball-track; second, an independent ball or crushing-sphere; third, aball-actnating annulus; fourth, disks between which the annulusis placed,and which impart motion to ityfit'th, springs connected. with the annulus so as to cause the latter to resist compression exerted from without inwardly upon it in any direction; and, sixth, devices for imparting rotation to the disks.

3. In a pulverizing-machine, the combination of a casing, a crushing sphere or ball, a shaftjournaled in the casing, two disks upon the shaft, provided with devices for engaging with the annulus, a ball-actuating annulus, and springs interposed between the annulus and the central shaft.

'4. In a pulverizing-mnchine, the combination of two disks provided with radial projecting webs, an annulus provided with pockets or lugs against which the webs of the disks engage, and springs orcushioning devices interposed between t-heinterior of the annulus and the shaft, substantially as set forth.

In testimony whereof I have hereunto signed my name this 16th day of December, A. D. 1882.

HERMANN BERNHARD FELDMANN.

In presence of-- J. BONSALL TAYLOR, WALTER S. GIBSON. 

